/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:58:50,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:58:50,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:58:50,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 22:58:50,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 22:58:50,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 22:58:50,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 22:58:50,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 22:58:50,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 22:58:50,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 22:58:50,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 22:58:50,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 22:58:50,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:58:50,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:58:50,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:58:50,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:58:50,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:58:50,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:58:50,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:58:50,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:58:50,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:58:50,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:58:50,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:58:50,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:58:50,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 22:58:50,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 22:58:50,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 22:58:50,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 22:58:50,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 22:58:50,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 22:58:50,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 22:58:50,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 22:58:50,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 22:58:50,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 22:58:50,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 22:58:50,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 22:58:50,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 22:58:50,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 22:58:50,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:58:50,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:58:50,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:58:50,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:58:50,921 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:58:50,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:58:50,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:58:50,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:58:50,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:58:50,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:58:50,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:58:50,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:58:50,923 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:58:50,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:58:50,924 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:58:50,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:58:50,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:58:50,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:58:50,926 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:58:51,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:58:51,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:58:51,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:58:51,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:58:51,148 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:58:51,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2023-04-01 22:58:52,159 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:58:52,479 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:58:52,479 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2023-04-01 22:58:52,493 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0c7cad8/ef8c9d800705407087982bbfaa0f4fd0/FLAG2f4b119d8 [2023-04-01 22:58:52,509 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0c7cad8/ef8c9d800705407087982bbfaa0f4fd0 [2023-04-01 22:58:52,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:58:52,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:58:52,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:58:52,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:58:52,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:58:52,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:58:52" (1/1) ... [2023-04-01 22:58:52,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ae9360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:52, skipping insertion in model container [2023-04-01 22:58:52,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:58:52" (1/1) ... [2023-04-01 22:58:52,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:58:52,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:58:52,786 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2023-04-01 22:58:53,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:58:53,138 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:58:53,166 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2023-04-01 22:58:53,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:58:53,370 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:58:53,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53 WrapperNode [2023-04-01 22:58:53,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:58:53,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:58:53,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:58:53,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:58:53,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:58:53,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:58:53,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:58:53,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:58:53,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (1/1) ... [2023-04-01 22:58:53,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:58:53,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:53,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:58:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:58:53,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:58:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:58:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:58:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:58:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:58:53,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:58:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:58:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:58:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:58:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:58:53,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:58:53,645 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:58:53,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:58:55,759 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:58:55,772 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:58:55,772 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:58:55,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:55 BoogieIcfgContainer [2023-04-01 22:58:55,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:58:55,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:58:55,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:58:55,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:58:55,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:58:52" (1/3) ... [2023-04-01 22:58:55,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f6e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:55, skipping insertion in model container [2023-04-01 22:58:55,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:53" (2/3) ... [2023-04-01 22:58:55,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f6e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:55, skipping insertion in model container [2023-04-01 22:58:55,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:55" (3/3) ... [2023-04-01 22:58:55,782 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label13.c [2023-04-01 22:58:55,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:58:55,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:58:55,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:58:55,854 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@771524b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:58:55,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:58:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 22:58:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 22:58:55,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:55,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:55,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:55,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1374062001, now seen corresponding path program 1 times [2023-04-01 22:58:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:55,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853317584] [2023-04-01 22:58:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:58:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853317584] [2023-04-01 22:58:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853317584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:56,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:58:56,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:58:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608643581] [2023-04-01 22:58:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:58:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:58:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:58:56,336 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:58:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:59,164 INFO L93 Difference]: Finished difference Result 1203 states and 2166 transitions. [2023-04-01 22:58:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:58:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 22:58:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:59,178 INFO L225 Difference]: With dead ends: 1203 [2023-04-01 22:58:59,178 INFO L226 Difference]: Without dead ends: 702 [2023-04-01 22:58:59,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:58:59,188 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1023 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:59,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 85 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:58:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-04-01 22:58:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 696. [2023-04-01 22:58:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 680 states have (on average 1.4676470588235293) internal successors, (998), 682 states have internal predecessors, (998), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:58:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1015 transitions. [2023-04-01 22:58:59,257 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1015 transitions. Word has length 54 [2023-04-01 22:58:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:59,258 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1015 transitions. [2023-04-01 22:58:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:58:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1015 transitions. [2023-04-01 22:58:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 22:58:59,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:59,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:58:59,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:59,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -403641209, now seen corresponding path program 1 times [2023-04-01 22:58:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:59,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423661555] [2023-04-01 22:58:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:59,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:58:59,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423661555] [2023-04-01 22:58:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423661555] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:59,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:58:59,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:58:59,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809444975] [2023-04-01 22:58:59,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:59,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:58:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:58:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:58:59,671 INFO L87 Difference]: Start difference. First operand 696 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:03,795 INFO L93 Difference]: Finished difference Result 2070 states and 3047 transitions. [2023-04-01 22:59:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:59:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 133 [2023-04-01 22:59:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:03,800 INFO L225 Difference]: With dead ends: 2070 [2023-04-01 22:59:03,801 INFO L226 Difference]: Without dead ends: 1380 [2023-04-01 22:59:03,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:59:03,802 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1014 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:03,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 241 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 22:59:03,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2023-04-01 22:59:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1359. [2023-04-01 22:59:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1323 states have (on average 1.3854875283446713) internal successors, (1833), 1334 states have internal predecessors, (1833), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (45), 14 states have call predecessors, (45), 9 states have call successors, (45) [2023-04-01 22:59:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1888 transitions. [2023-04-01 22:59:03,854 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1888 transitions. Word has length 133 [2023-04-01 22:59:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:03,855 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1888 transitions. [2023-04-01 22:59:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1888 transitions. [2023-04-01 22:59:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 22:59:03,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:03,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:03,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:59:03,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:03,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash -498818305, now seen corresponding path program 1 times [2023-04-01 22:59:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:03,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956818955] [2023-04-01 22:59:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:03,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:04,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:59:04,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956818955] [2023-04-01 22:59:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956818955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:59:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:59:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058350450] [2023-04-01 22:59:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:59:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:59:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:59:04,166 INFO L87 Difference]: Start difference. First operand 1359 states and 1888 transitions. Second operand has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:07,078 INFO L93 Difference]: Finished difference Result 4068 states and 5761 transitions. [2023-04-01 22:59:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:59:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 137 [2023-04-01 22:59:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:07,090 INFO L225 Difference]: With dead ends: 4068 [2023-04-01 22:59:07,090 INFO L226 Difference]: Without dead ends: 2715 [2023-04-01 22:59:07,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:59:07,094 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1274 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:07,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 169 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 22:59:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-04-01 22:59:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2338. [2023-04-01 22:59:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2265 states have (on average 1.2701986754966887) internal successors, (2877), 2298 states have internal predecessors, (2877), 16 states have call successors, (16), 16 states have call predecessors, (16), 56 states have return successors, (109), 23 states have call predecessors, (109), 15 states have call successors, (109) [2023-04-01 22:59:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3002 transitions. [2023-04-01 22:59:07,148 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3002 transitions. Word has length 137 [2023-04-01 22:59:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:07,149 INFO L495 AbstractCegarLoop]: Abstraction has 2338 states and 3002 transitions. [2023-04-01 22:59:07,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3002 transitions. [2023-04-01 22:59:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 22:59:07,151 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:07,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:59:07,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:07,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash -624783098, now seen corresponding path program 1 times [2023-04-01 22:59:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:07,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141643085] [2023-04-01 22:59:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:07,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:59:07,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141643085] [2023-04-01 22:59:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141643085] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412513732] [2023-04-01 22:59:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:07,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:07,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:59:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:07,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:07,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:59:07,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:59:07,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412513732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:07,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:59:07,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:59:07,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124599695] [2023-04-01 22:59:07,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:07,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:07,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:07,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:59:07,691 INFO L87 Difference]: Start difference. First operand 2338 states and 3002 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:59:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:09,177 INFO L93 Difference]: Finished difference Result 5922 states and 7863 transitions. [2023-04-01 22:59:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 254 [2023-04-01 22:59:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:09,192 INFO L225 Difference]: With dead ends: 5922 [2023-04-01 22:59:09,193 INFO L226 Difference]: Without dead ends: 3590 [2023-04-01 22:59:09,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:59:09,202 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 329 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:09,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 222 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 22:59:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2023-04-01 22:59:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3587. [2023-04-01 22:59:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3489 states have (on average 1.2588134135855547) internal successors, (4392), 3530 states have internal predecessors, (4392), 24 states have call successors, (24), 24 states have call predecessors, (24), 73 states have return successors, (220), 32 states have call predecessors, (220), 23 states have call successors, (220) [2023-04-01 22:59:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 4636 transitions. [2023-04-01 22:59:09,284 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 4636 transitions. Word has length 254 [2023-04-01 22:59:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:09,285 INFO L495 AbstractCegarLoop]: Abstraction has 3587 states and 4636 transitions. [2023-04-01 22:59:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:59:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 4636 transitions. [2023-04-01 22:59:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2023-04-01 22:59:09,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:09,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:09,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:09,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:09,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:09,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1224303646, now seen corresponding path program 1 times [2023-04-01 22:59:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387189102] [2023-04-01 22:59:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:09,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:09,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:09,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 22:59:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 22:59:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387189102] [2023-04-01 22:59:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387189102] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959079281] [2023-04-01 22:59:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:09,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:09,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:59:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:10,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:10,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 22:59:10,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:59:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959079281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:10,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:59:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:59:10,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736506526] [2023-04-01 22:59:10,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:59:10,171 INFO L87 Difference]: Start difference. First operand 3587 states and 4636 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:11,620 INFO L93 Difference]: Finished difference Result 8413 states and 11147 transitions. [2023-04-01 22:59:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:11,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 422 [2023-04-01 22:59:11,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:11,634 INFO L225 Difference]: With dead ends: 8413 [2023-04-01 22:59:11,634 INFO L226 Difference]: Without dead ends: 4832 [2023-04-01 22:59:11,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:59:11,640 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 288 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:11,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 648 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 22:59:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2023-04-01 22:59:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 4831. [2023-04-01 22:59:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4710 states have (on average 1.2142250530785563) internal successors, (5719), 4758 states have internal predecessors, (5719), 32 states have call successors, (32), 32 states have call predecessors, (32), 88 states have return successors, (313), 40 states have call predecessors, (313), 31 states have call successors, (313) [2023-04-01 22:59:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6064 transitions. [2023-04-01 22:59:11,725 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6064 transitions. Word has length 422 [2023-04-01 22:59:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:11,725 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 6064 transitions. [2023-04-01 22:59:11,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6064 transitions. [2023-04-01 22:59:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-04-01 22:59:11,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:11,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:11,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:11,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:11,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 993552228, now seen corresponding path program 1 times [2023-04-01 22:59:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120697975] [2023-04-01 22:59:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 22:59:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 22:59:12,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:12,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120697975] [2023-04-01 22:59:12,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120697975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:12,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232884337] [2023-04-01 22:59:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:12,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:12,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:59:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 22:59:12,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 22:59:13,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 22:59:14,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232884337] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:14,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:59:14,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-04-01 22:59:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337707002] [2023-04-01 22:59:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:59:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:59:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:59:14,436 INFO L87 Difference]: Start difference. First operand 4831 states and 6064 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:16,109 INFO L93 Difference]: Finished difference Result 13719 states and 17645 transitions. [2023-04-01 22:59:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 22:59:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 447 [2023-04-01 22:59:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:16,167 INFO L225 Difference]: With dead ends: 13719 [2023-04-01 22:59:16,168 INFO L226 Difference]: Without dead ends: 8894 [2023-04-01 22:59:16,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:59:16,178 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 740 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:16,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 105 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 22:59:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8894 states. [2023-04-01 22:59:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8894 to 7971. [2023-04-01 22:59:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7777 states have (on average 1.2166645235952167) internal successors, (9462), 7854 states have internal predecessors, (9462), 52 states have call successors, (52), 52 states have call predecessors, (52), 141 states have return successors, (754), 64 states have call predecessors, (754), 51 states have call successors, (754) [2023-04-01 22:59:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 10268 transitions. [2023-04-01 22:59:16,368 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 10268 transitions. Word has length 447 [2023-04-01 22:59:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:16,369 INFO L495 AbstractCegarLoop]: Abstraction has 7971 states and 10268 transitions. [2023-04-01 22:59:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:59:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 10268 transitions. [2023-04-01 22:59:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-04-01 22:59:16,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:16,377 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:16,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:16,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:16,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:16,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 800731718, now seen corresponding path program 1 times [2023-04-01 22:59:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839012744] [2023-04-01 22:59:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:16,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:16,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 22:59:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2023-04-01 22:59:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 144 proven. 3 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-04-01 22:59:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839012744] [2023-04-01 22:59:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839012744] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89703569] [2023-04-01 22:59:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:17,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:17,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:17,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:59:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:59:17,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-04-01 22:59:17,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:59:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89703569] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:59:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:59:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357170125] [2023-04-01 22:59:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:59:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:59:17,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:59:17,912 INFO L87 Difference]: Start difference. First operand 7971 states and 10268 transitions. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 4 states have internal predecessors, (369), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:59:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:20,235 INFO L93 Difference]: Finished difference Result 16335 states and 21117 transitions. [2023-04-01 22:59:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:59:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 4 states have internal predecessors, (369), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 502 [2023-04-01 22:59:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:20,272 INFO L225 Difference]: With dead ends: 16335 [2023-04-01 22:59:20,272 INFO L226 Difference]: Without dead ends: 8370 [2023-04-01 22:59:20,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:59:20,288 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 599 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:20,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 181 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 22:59:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8370 states. [2023-04-01 22:59:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8370 to 7727. [2023-04-01 22:59:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7727 states, 7506 states have (on average 1.2187583266719957) internal successors, (9148), 7611 states have internal predecessors, (9148), 50 states have call successors, (50), 50 states have call predecessors, (50), 170 states have return successors, (873), 65 states have call predecessors, (873), 49 states have call successors, (873) [2023-04-01 22:59:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7727 states to 7727 states and 10071 transitions. [2023-04-01 22:59:20,477 INFO L78 Accepts]: Start accepts. Automaton has 7727 states and 10071 transitions. Word has length 502 [2023-04-01 22:59:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:20,477 INFO L495 AbstractCegarLoop]: Abstraction has 7727 states and 10071 transitions. [2023-04-01 22:59:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 4 states have internal predecessors, (369), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:59:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 7727 states and 10071 transitions. [2023-04-01 22:59:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2023-04-01 22:59:20,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:20,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:20,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:20,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:20,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:20,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -89722691, now seen corresponding path program 1 times [2023-04-01 22:59:20,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:20,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779613433] [2023-04-01 22:59:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2023-04-01 22:59:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 310 proven. 79 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 22:59:21,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779613433] [2023-04-01 22:59:21,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779613433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161376713] [2023-04-01 22:59:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:21,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:21,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:21,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:59:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:21,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:21,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 419 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 22:59:21,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 311 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 22:59:22,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161376713] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:22,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:22,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:59:22,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029308401] [2023-04-01 22:59:22,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:22,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:59:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:59:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:59:22,157 INFO L87 Difference]: Start difference. First operand 7727 states and 10071 transitions. Second operand has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:59:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:25,639 INFO L93 Difference]: Finished difference Result 17174 states and 22954 transitions. [2023-04-01 22:59:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 22:59:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 576 [2023-04-01 22:59:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:25,672 INFO L225 Difference]: With dead ends: 17174 [2023-04-01 22:59:25,672 INFO L226 Difference]: Without dead ends: 9760 [2023-04-01 22:59:25,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1193 GetRequests, 1167 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:59:25,685 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1887 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 4187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:25,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1887 Valid, 254 Invalid, 4187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 22:59:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2023-04-01 22:59:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 9720. [2023-04-01 22:59:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9720 states, 9404 states have (on average 1.1994895789025946) internal successors, (11280), 9576 states have internal predecessors, (11280), 62 states have call successors, (62), 62 states have call predecessors, (62), 253 states have return successors, (1295), 81 states have call predecessors, (1295), 61 states have call successors, (1295) [2023-04-01 22:59:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9720 states to 9720 states and 12637 transitions. [2023-04-01 22:59:25,849 INFO L78 Accepts]: Start accepts. Automaton has 9720 states and 12637 transitions. Word has length 576 [2023-04-01 22:59:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:25,849 INFO L495 AbstractCegarLoop]: Abstraction has 9720 states and 12637 transitions. [2023-04-01 22:59:25,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:59:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9720 states and 12637 transitions. [2023-04-01 22:59:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2023-04-01 22:59:25,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:25,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:25,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:26,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:26,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1352984821, now seen corresponding path program 1 times [2023-04-01 22:59:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118636735] [2023-04-01 22:59:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 22:59:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 22:59:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2023-04-01 22:59:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 288 proven. 244 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-01 22:59:26,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118636735] [2023-04-01 22:59:26,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118636735] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:26,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304159708] [2023-04-01 22:59:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:26,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:26,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:26,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:59:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:26,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 22:59:26,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 569 proven. 41 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-04-01 22:59:28,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 200 proven. 498 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-01 22:59:29,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304159708] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:29,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2023-04-01 22:59:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922853111] [2023-04-01 22:59:29,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:29,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 22:59:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 22:59:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-01 22:59:29,473 INFO L87 Difference]: Start difference. First operand 9720 states and 12637 transitions. Second operand has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:59:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:44,149 INFO L93 Difference]: Finished difference Result 36715 states and 48107 transitions. [2023-04-01 22:59:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-01 22:59:44,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 597 [2023-04-01 22:59:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:44,192 INFO L225 Difference]: With dead ends: 36715 [2023-04-01 22:59:44,193 INFO L226 Difference]: Without dead ends: 21883 [2023-04-01 22:59:44,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1435 GetRequests, 1301 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7012 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2732, Invalid=15358, Unknown=0, NotChecked=0, Total=18090 [2023-04-01 22:59:44,217 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 9255 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 13326 mSolverCounterSat, 2300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9255 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 15626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2300 IncrementalHoareTripleChecker+Valid, 13326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:44,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9255 Valid, 679 Invalid, 15626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2300 Valid, 13326 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2023-04-01 22:59:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21883 states. [2023-04-01 22:59:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21883 to 16558. [2023-04-01 22:59:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16558 states, 16117 states have (on average 1.11968728671589) internal successors, (18046), 16332 states have internal predecessors, (18046), 106 states have call successors, (106), 106 states have call predecessors, (106), 334 states have return successors, (1966), 119 states have call predecessors, (1966), 105 states have call successors, (1966) [2023-04-01 22:59:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16558 states to 16558 states and 20118 transitions. [2023-04-01 22:59:44,578 INFO L78 Accepts]: Start accepts. Automaton has 16558 states and 20118 transitions. Word has length 597 [2023-04-01 22:59:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:44,578 INFO L495 AbstractCegarLoop]: Abstraction has 16558 states and 20118 transitions. [2023-04-01 22:59:44,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:59:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 16558 states and 20118 transitions. [2023-04-01 22:59:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2023-04-01 22:59:44,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:44,585 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:44,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 22:59:44,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:44,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:44,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash -803117457, now seen corresponding path program 1 times [2023-04-01 22:59:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061320624] [2023-04-01 22:59:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:44,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 22:59:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2023-04-01 22:59:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 353 proven. 78 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-04-01 22:59:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:45,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061320624] [2023-04-01 22:59:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061320624] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679824784] [2023-04-01 22:59:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:45,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:45,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:45,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:59:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:45,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:45,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-01 22:59:45,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 355 proven. 79 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-04-01 22:59:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679824784] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:45,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:45,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:59:45,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983703898] [2023-04-01 22:59:45,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:45,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:59:45,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:59:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:59:45,781 INFO L87 Difference]: Start difference. First operand 16558 states and 20118 transitions. Second operand has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:59:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:49,786 INFO L93 Difference]: Finished difference Result 34071 states and 41132 transitions. [2023-04-01 22:59:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 22:59:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 598 [2023-04-01 22:59:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:49,822 INFO L225 Difference]: With dead ends: 34071 [2023-04-01 22:59:49,822 INFO L226 Difference]: Without dead ends: 17826 [2023-04-01 22:59:49,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1213 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:59:49,843 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 2672 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5153 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 5665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 5153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:49,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2677 Valid, 276 Invalid, 5665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 5153 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 22:59:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2023-04-01 22:59:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 16895. [2023-04-01 22:59:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16895 states, 16436 states have (on average 1.0822584570455098) internal successors, (17788), 16665 states have internal predecessors, (17788), 108 states have call successors, (108), 108 states have call predecessors, (108), 350 states have return successors, (1399), 121 states have call predecessors, (1399), 107 states have call successors, (1399) [2023-04-01 22:59:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16895 states to 16895 states and 19295 transitions. [2023-04-01 22:59:50,180 INFO L78 Accepts]: Start accepts. Automaton has 16895 states and 19295 transitions. Word has length 598 [2023-04-01 22:59:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:50,180 INFO L495 AbstractCegarLoop]: Abstraction has 16895 states and 19295 transitions. [2023-04-01 22:59:50,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.5) internal successors, (594), 10 states have internal predecessors, (594), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:59:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 16895 states and 19295 transitions. [2023-04-01 22:59:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2023-04-01 22:59:50,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:50,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:50,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:50,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:50,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1660530895, now seen corresponding path program 1 times [2023-04-01 22:59:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775724963] [2023-04-01 22:59:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:51,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:51,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 22:59:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 301 proven. 186 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:59:51,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:51,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775724963] [2023-04-01 22:59:51,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775724963] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:51,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460313331] [2023-04-01 22:59:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:51,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:51,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:51,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:51,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:59:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 22:59:52,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 11 proven. 136 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:52,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460313331] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:52,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:59:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11, 6] total 16 [2023-04-01 22:59:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872268496] [2023-04-01 22:59:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:59:52,820 INFO L87 Difference]: Start difference. First operand 16895 states and 19295 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:54,101 INFO L93 Difference]: Finished difference Result 38389 states and 44383 transitions. [2023-04-01 22:59:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 601 [2023-04-01 22:59:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:54,142 INFO L225 Difference]: With dead ends: 38389 [2023-04-01 22:59:54,142 INFO L226 Difference]: Without dead ends: 21807 [2023-04-01 22:59:54,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1202 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:59:54,160 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 372 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:54,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 476 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 22:59:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21807 states. [2023-04-01 22:59:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21807 to 20569. [2023-04-01 22:59:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20067 states have (on average 1.0752977525290277) internal successors, (21578), 20291 states have internal predecessors, (21578), 132 states have call successors, (132), 132 states have call predecessors, (132), 369 states have return successors, (1656), 145 states have call predecessors, (1656), 131 states have call successors, (1656) [2023-04-01 22:59:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 23366 transitions. [2023-04-01 22:59:54,453 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 23366 transitions. Word has length 601 [2023-04-01 22:59:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 20569 states and 23366 transitions. [2023-04-01 22:59:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 23366 transitions. [2023-04-01 22:59:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2023-04-01 22:59:54,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:54,470 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:54,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 22:59:54,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:54,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -712463344, now seen corresponding path program 1 times [2023-04-01 22:59:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37000269] [2023-04-01 22:59:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 22:59:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2023-04-01 22:59:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2023-04-01 22:59:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37000269] [2023-04-01 22:59:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37000269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967864035] [2023-04-01 22:59:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:55,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:55,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:55,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:59:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:55,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:55,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 580 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:55,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 580 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967864035] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:56,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:56,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:59:56,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443815664] [2023-04-01 22:59:56,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:59:56,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:59:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:59:56,144 INFO L87 Difference]: Start difference. First operand 20569 states and 23366 transitions. Second operand has 11 states, 11 states have (on average 71.0909090909091) internal successors, (782), 9 states have internal predecessors, (782), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:59,004 INFO L93 Difference]: Finished difference Result 40879 states and 46583 transitions. [2023-04-01 22:59:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 22:59:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 71.0909090909091) internal successors, (782), 9 states have internal predecessors, (782), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 755 [2023-04-01 22:59:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:59,045 INFO L225 Difference]: With dead ends: 40879 [2023-04-01 22:59:59,045 INFO L226 Difference]: Without dead ends: 20623 [2023-04-01 22:59:59,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1527 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:59:59,069 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1623 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:59,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1627 Valid, 240 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 22:59:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20623 states. [2023-04-01 22:59:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20623 to 19957. [2023-04-01 22:59:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19957 states, 19462 states have (on average 1.0592436543006885) internal successors, (20615), 19687 states have internal predecessors, (20615), 128 states have call successors, (128), 128 states have call predecessors, (128), 366 states have return successors, (1275), 141 states have call predecessors, (1275), 127 states have call successors, (1275) [2023-04-01 22:59:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19957 states to 19957 states and 22018 transitions. [2023-04-01 22:59:59,353 INFO L78 Accepts]: Start accepts. Automaton has 19957 states and 22018 transitions. Word has length 755 [2023-04-01 22:59:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:59,354 INFO L495 AbstractCegarLoop]: Abstraction has 19957 states and 22018 transitions. [2023-04-01 22:59:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 71.0909090909091) internal successors, (782), 9 states have internal predecessors, (782), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19957 states and 22018 transitions. [2023-04-01 22:59:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2023-04-01 22:59:59,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:59,369 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:59,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:59,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:59,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 683832390, now seen corresponding path program 1 times [2023-04-01 22:59:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:59,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889648842] [2023-04-01 22:59:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:59,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:00,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:00:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:01,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 561 [2023-04-01 23:00:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 352 proven. 492 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 23:00:01,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889648842] [2023-04-01 23:00:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889648842] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176509422] [2023-04-01 23:00:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:01,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:01,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:00:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:01,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:01,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2023-04-01 23:00:01,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:00:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176509422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:01,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:00:01,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 23:00:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126093456] [2023-04-01 23:00:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:00:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:00:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:00:01,771 INFO L87 Difference]: Start difference. First operand 19957 states and 22018 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:04,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:00:06,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:00:10,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:00:12,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:00:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:13,050 INFO L93 Difference]: Finished difference Result 46735 states and 51674 transitions. [2023-04-01 23:00:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:00:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 761 [2023-04-01 23:00:13,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:13,106 INFO L225 Difference]: With dead ends: 46735 [2023-04-01 23:00:13,106 INFO L226 Difference]: Without dead ends: 27091 [2023-04-01 23:00:13,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:00:13,133 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 296 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 161 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:13,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 277 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 894 Invalid, 4 Unknown, 0 Unchecked, 11.0s Time] [2023-04-01 23:00:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27091 states. [2023-04-01 23:00:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27091 to 24307. [2023-04-01 23:00:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 23738 states have (on average 1.0569972196478221) internal successors, (25091), 23978 states have internal predecessors, (25091), 156 states have call successors, (156), 156 states have call predecessors, (156), 412 states have return successors, (1547), 172 states have call predecessors, (1547), 155 states have call successors, (1547) [2023-04-01 23:00:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 26794 transitions. [2023-04-01 23:00:13,649 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 26794 transitions. Word has length 761 [2023-04-01 23:00:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:13,650 INFO L495 AbstractCegarLoop]: Abstraction has 24307 states and 26794 transitions. [2023-04-01 23:00:13,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 26794 transitions. [2023-04-01 23:00:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-04-01 23:00:13,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:13,673 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:13,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:00:13,880 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:13,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1290897429, now seen corresponding path program 1 times [2023-04-01 23:00:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813280937] [2023-04-01 23:00:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:14,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:15,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:00:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:15,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2023-04-01 23:00:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 352 proven. 564 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 23:00:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813280937] [2023-04-01 23:00:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813280937] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474789197] [2023-04-01 23:00:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:15,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:15,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:15,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:00:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:15,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:00:15,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 735 proven. 84 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 23:00:16,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 660 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 23:00:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474789197] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:19,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:19,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 19 [2023-04-01 23:00:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255504565] [2023-04-01 23:00:19,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:00:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:00:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:00:19,107 INFO L87 Difference]: Start difference. First operand 24307 states and 26794 transitions. Second operand has 19 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 17 states have internal predecessors, (1259), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 23:00:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:29,915 INFO L93 Difference]: Finished difference Result 57358 states and 63007 transitions. [2023-04-01 23:00:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-04-01 23:00:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 17 states have internal predecessors, (1259), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 796 [2023-04-01 23:00:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:29,970 INFO L225 Difference]: With dead ends: 57358 [2023-04-01 23:00:29,970 INFO L226 Difference]: Without dead ends: 33053 [2023-04-01 23:00:29,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1759 GetRequests, 1659 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1426, Invalid=8674, Unknown=0, NotChecked=0, Total=10100 [2023-04-01 23:00:29,998 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 8355 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 10246 mSolverCounterSat, 1766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8355 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 12012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1766 IncrementalHoareTripleChecker+Valid, 10246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:30,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8355 Valid, 651 Invalid, 12012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1766 Valid, 10246 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 23:00:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33053 states. [2023-04-01 23:00:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33053 to 31781. [2023-04-01 23:00:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31781 states, 31075 states have (on average 1.0488817377312953) internal successors, (32594), 31355 states have internal predecessors, (32594), 204 states have call successors, (204), 204 states have call predecessors, (204), 501 states have return successors, (1792), 221 states have call predecessors, (1792), 203 states have call successors, (1792) [2023-04-01 23:00:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31781 states to 31781 states and 34590 transitions. [2023-04-01 23:00:30,493 INFO L78 Accepts]: Start accepts. Automaton has 31781 states and 34590 transitions. Word has length 796 [2023-04-01 23:00:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:30,493 INFO L495 AbstractCegarLoop]: Abstraction has 31781 states and 34590 transitions. [2023-04-01 23:00:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 17 states have internal predecessors, (1259), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 23:00:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31781 states and 34590 transitions. [2023-04-01 23:00:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2023-04-01 23:00:30,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:30,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:30,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:00:30,732 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1776309432, now seen corresponding path program 1 times [2023-04-01 23:00:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421481828] [2023-04-01 23:00:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:00:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2023-04-01 23:00:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2023-04-01 23:00:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 601 proven. 120 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2023-04-01 23:00:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421481828] [2023-04-01 23:00:31,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421481828] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523116287] [2023-04-01 23:00:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:31,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:31,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:31,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:31,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:00:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:31,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:00:31,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 1097 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 23:00:31,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 604 proven. 121 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2023-04-01 23:00:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523116287] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:32,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:32,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2023-04-01 23:00:32,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435792901] [2023-04-01 23:00:32,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:32,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:00:32,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:32,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:00:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:00:32,209 INFO L87 Difference]: Start difference. First operand 31781 states and 34590 transitions. Second operand has 13 states, 13 states have (on average 65.46153846153847) internal successors, (851), 11 states have internal predecessors, (851), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:00:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:36,767 INFO L93 Difference]: Finished difference Result 74063 states and 80761 transitions. [2023-04-01 23:00:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 23:00:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 65.46153846153847) internal successors, (851), 11 states have internal predecessors, (851), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 897 [2023-04-01 23:00:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:36,850 INFO L225 Difference]: With dead ends: 74063 [2023-04-01 23:00:36,850 INFO L226 Difference]: Without dead ends: 42595 [2023-04-01 23:00:36,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1810 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:00:36,889 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2166 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4305 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 4788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 4305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:36,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2166 Valid, 325 Invalid, 4788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 4305 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 23:00:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42595 states. [2023-04-01 23:00:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42595 to 35181. [2023-04-01 23:00:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35181 states, 34420 states have (on average 1.046310284718187) internal successors, (36014), 34710 states have internal predecessors, (36014), 226 states have call successors, (226), 226 states have call predecessors, (226), 534 states have return successors, (1892), 244 states have call predecessors, (1892), 225 states have call successors, (1892) [2023-04-01 23:00:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35181 states to 35181 states and 38132 transitions. [2023-04-01 23:00:37,465 INFO L78 Accepts]: Start accepts. Automaton has 35181 states and 38132 transitions. Word has length 897 [2023-04-01 23:00:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:37,466 INFO L495 AbstractCegarLoop]: Abstraction has 35181 states and 38132 transitions. [2023-04-01 23:00:37,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.46153846153847) internal successors, (851), 11 states have internal predecessors, (851), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:00:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35181 states and 38132 transitions. [2023-04-01 23:00:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2023-04-01 23:00:37,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:37,492 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:37,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:37,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 23:00:37,699 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:37,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:37,699 INFO L85 PathProgramCache]: Analyzing trace with hash -222983398, now seen corresponding path program 1 times [2023-04-01 23:00:37,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:37,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057953929] [2023-04-01 23:00:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:00:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:00:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 661 [2023-04-01 23:00:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 456 proven. 143 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2023-04-01 23:00:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057953929] [2023-04-01 23:00:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057953929] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870533134] [2023-04-01 23:00:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:39,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:39,022 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:39,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:00:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:39,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:00:39,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 1057 proven. 4 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:00:39,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 802 proven. 2 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-04-01 23:00:42,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870533134] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:42,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 17 [2023-04-01 23:00:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119094489] [2023-04-01 23:00:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:00:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:00:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:00:42,201 INFO L87 Difference]: Start difference. First operand 35181 states and 38132 transitions. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 15 states have internal predecessors, (954), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:00:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:51,137 INFO L93 Difference]: Finished difference Result 76991 states and 83895 transitions. [2023-04-01 23:00:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-04-01 23:00:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 15 states have internal predecessors, (954), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 902 [2023-04-01 23:00:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:51,219 INFO L225 Difference]: With dead ends: 76991 [2023-04-01 23:00:51,219 INFO L226 Difference]: Without dead ends: 41812 [2023-04-01 23:00:51,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1865 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1201, Invalid=5279, Unknown=0, NotChecked=0, Total=6480 [2023-04-01 23:00:51,263 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 7824 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 10070 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7824 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 11185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 10070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7824 Valid, 620 Invalid, 11185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 10070 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 23:00:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41812 states. [2023-04-01 23:00:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41812 to 36740. [2023-04-01 23:00:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36740 states, 35946 states have (on average 1.0448172258387582) internal successors, (37557), 36250 states have internal predecessors, (37557), 236 states have call successors, (236), 236 states have call predecessors, (236), 557 states have return successors, (1949), 253 states have call predecessors, (1949), 235 states have call successors, (1949) [2023-04-01 23:00:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36740 states to 36740 states and 39742 transitions. [2023-04-01 23:00:51,938 INFO L78 Accepts]: Start accepts. Automaton has 36740 states and 39742 transitions. Word has length 902 [2023-04-01 23:00:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:51,939 INFO L495 AbstractCegarLoop]: Abstraction has 36740 states and 39742 transitions. [2023-04-01 23:00:51,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 15 states have internal predecessors, (954), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:00:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36740 states and 39742 transitions. [2023-04-01 23:00:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1110 [2023-04-01 23:00:51,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:51,985 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:51,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:52,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:00:52,194 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:52,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:52,194 INFO L85 PathProgramCache]: Analyzing trace with hash -923422902, now seen corresponding path program 1 times [2023-04-01 23:00:52,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:52,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420192086] [2023-04-01 23:00:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:52,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:00:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2023-04-01 23:00:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 647 [2023-04-01 23:00:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 868 [2023-04-01 23:00:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 542 proven. 359 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2023-04-01 23:00:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420192086] [2023-04-01 23:00:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420192086] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019513454] [2023-04-01 23:00:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:53,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:53,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:00:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 1462 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:00:53,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 985 proven. 50 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2023-04-01 23:00:54,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 1033 proven. 2 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2023-04-01 23:00:56,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019513454] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:56,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-04-01 23:00:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075061594] [2023-04-01 23:00:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:00:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:00:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:00:56,793 INFO L87 Difference]: Start difference. First operand 36740 states and 39742 transitions. Second operand has 16 states, 16 states have (on average 59.75) internal successors, (956), 14 states have internal predecessors, (956), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:01:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:11,239 INFO L93 Difference]: Finished difference Result 94889 states and 102661 transitions. [2023-04-01 23:01:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-04-01 23:01:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 59.75) internal successors, (956), 14 states have internal predecessors, (956), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 1109 [2023-04-01 23:01:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:11,241 INFO L225 Difference]: With dead ends: 94889 [2023-04-01 23:01:11,241 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 23:01:11,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2399 GetRequests, 2302 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1581, Invalid=8121, Unknown=0, NotChecked=0, Total=9702 [2023-04-01 23:01:11,296 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 8057 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 18101 mSolverCounterSat, 1744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8057 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 19845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1744 IncrementalHoareTripleChecker+Valid, 18101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:11,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8057 Valid, 566 Invalid, 19845 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1744 Valid, 18101 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-04-01 23:01:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 23:01:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 23:01:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 23:01:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 23:01:11,297 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1109 [2023-04-01 23:01:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:11,297 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 23:01:11,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 59.75) internal successors, (956), 14 states have internal predecessors, (956), 7 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:01:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 23:01:11,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 23:01:11,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 23:01:11,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:11,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 23:01:53,056 WARN L223 SmtUtils]: Spent 26.12s on a formula simplification. DAG size of input: 748 DAG size of output: 753 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-04-01 23:02:19,342 WARN L223 SmtUtils]: Spent 26.28s on a formula simplification. DAG size of input: 748 DAG size of output: 753 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-04-01 23:02:28,388 WARN L223 SmtUtils]: Spent 9.00s on a formula simplification. DAG size of input: 1110 DAG size of output: 150 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-04-01 23:02:38,092 WARN L223 SmtUtils]: Spent 9.61s on a formula simplification. DAG size of input: 1148 DAG size of output: 178 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-04-01 23:02:46,925 WARN L223 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 1111 DAG size of output: 155 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)